EP0158813A1 - Dispositif de fixation pour couteau tournant sur une axe - Google Patents

Dispositif de fixation pour couteau tournant sur une axe Download PDF

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Publication number
EP0158813A1
EP0158813A1 EP85102691A EP85102691A EP0158813A1 EP 0158813 A1 EP0158813 A1 EP 0158813A1 EP 85102691 A EP85102691 A EP 85102691A EP 85102691 A EP85102691 A EP 85102691A EP 0158813 A1 EP0158813 A1 EP 0158813A1
Authority
EP
European Patent Office
Prior art keywords
holding device
cutting knife
pin
guide grooves
holding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85102691A
Other languages
German (de)
English (en)
Other versions
EP0158813B1 (fr
Inventor
James L. Rittenhouse
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Deere and Co
Original Assignee
Deere and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Deere and Co filed Critical Deere and Co
Publication of EP0158813A1 publication Critical patent/EP0158813A1/fr
Application granted granted Critical
Publication of EP0158813B1 publication Critical patent/EP0158813B1/fr
Expired legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/73—Cutting apparatus
    • A01D34/733—Cutting-blade mounting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B7/00—Hand knives with reciprocating motor-driven blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/40—Clamping arrangements where clamping parts are received in recesses of elements to be connected
    • F16B2200/403—Threaded clamping parts

Definitions

  • the invention relates to a holding device for a cutting knife that rotates around an axis and has a centrally arranged opening through which a pin that can be inserted into the holding device is guided.
  • the cutting knife is screwed together with holding devices of this type (John Deere operating instructions for self-propelled rotary mower OM-M 83768, edition 31, page 34). Tools are required for fastening or loosening, the cutting knife must be held by the cutting edges by hand, which can lead to injuries.
  • the object underlying the invention is seen in being able to attach and detach the cutting knife without tools.
  • the holding device for receiving the cutting knife is provided with two mutually opposite and mutually open guide grooves and the pin in the holding device is arranged to be longitudinally displaceable and can be latched into the opening under the action of a spring.
  • the cutting knife only needs to be inserted into the guide grooves for fastening, the guide grooves ensuring a secure hold and the pin providing protection against displacement. To release it is only necessary to push the pin into the holding device and to pull the cutting knife out of the guide grooves.
  • the overall weight of the holding device is reduced and the cutting knife no longer has to be pulled or pushed through the entire length of the guide grooves during insertion and loosening.
  • the peg can then be pushed back through the surface of the cutting knife when the cutting knife is inserted, in order to then later independently snap into the opening.
  • Each guide groove can expediently be U-shaped, the outer leg being interrupted in such a way that projections are formed.
  • the guide grooves can be provided in a simple manner on the outside of a holding plate, which at the same time forms the inner legs of the guide grooves.
  • the pin has a long bore through which a holding pin which can be connected to the holding device is guided.
  • a holding device is designated 100, into which a longer but relatively narrow part, such as a cutting knife 200, can be inserted.
  • the holding device can be used in a lawn mower and is then driven in rotation.
  • the application is not limited to lawn mowers, however, and can be used wherever longitudinal parts rotate around an axis, such as in blowers, meat grinders, feed cutters or propeller devices.
  • the holding device 100 can have freely selectable dimensions in order to be able to accommodate a corresponding longitudinal part of corresponding width and thickness.
  • the holding device 100 consists of a holding body 102 which can be connected in a suitable manner to a rotary drive.
  • the holding body 102 is expediently circular in cross section in a partial area, this section being connectable to the rotary drive, not shown.
  • a flat holding plate 104 which can hold the cutting knife 200, adjoins this partial area.
  • the holding plate 104 has two guide grooves 106 and 108 which are provided in the region of their side edges 110 and 112.
  • the guide grooves 106 and 108 are formed from side walls 114 and 116 provided on the side edges 110 and 112, which face downwards perpendicularly from the flat underside of the holding plate 104.
  • plate-shaped projections 126 and 128 running parallel to the underside of the holding plate 104 are connected such that between the underside of the holding device, the inner walls of the. Sidewalls and the tops of the projections, the guide grooves 106 and 108 arise.
  • the protrusions 126 and 128 are distributed along the length of the holding plate 104, whereby grooves are formed between the protrusions.
  • the construction described above can also be formed in one piece, it only being necessary for the guide grooves to be interrupted at the bottom.
  • a central engagement part 130 can be seen in FIG. 3, which is pressed downwards or outwards from a cavity 131 provided in the circular partial region of the holding body 102 through an opening in the holding plate 104 in order to engage in an opening 202 in the cutting knife 200 to be able to.
  • the engagement part 130 consists of a pin 132, which is to engage in the opening 202, a compression spring 134, which presses the pin 132 outwards in the direction of the cutting knife 200 to be inserted, and a retaining pin, not shown, which ensures that the pin 132 in the Cavity 131 is longitudinally displaceable and cannot fall out of the cavity 131. This is in the Holding body in the circular portion of a radial bore 135, which is shown in FIG.
  • the pin 132 is provided with an elongated bore 136.
  • the retaining pin can thus be inserted into the bore 135, extending through the long bore 136.
  • the pin, compression spring and retaining pin can be made from any material, preferably metallic. The dimensions can also be chosen arbitrarily, the pin 132 being to be easily displaceable in the cavity and to be used with as little play as possible.
  • the cutting knife 200 shown in FIG. 5 has in its center the opening 202 in which the engaging part 130 or its pin 132 is intended to engage.
  • the dimensions of the opening 202 correspond to the cross section of the lower pin part. It is expediently round and arranged in a fastening area 204.
  • the opening 202 is a through hole, which thus extends from an outer side 205 of the cutting knife 200 to the other outer side 206.
  • the side edges of the cutting knife 200 are designated by 208 and 210 and have incisions or grooves 212 and 214 in the fastening area 204, whereby projections 216 and 218 are formed, which are to be arranged such that they are in the inserted state of the cutting knife 200 with the projections 126 and 128 the holding plate 104 cooperate.
  • the side edges 208 and 210 are ground to form cutting areas 220 and 222, which are only partially shown in FIG. 5.
  • the cutting areas can be arranged so that the cutting knife 200 only has to be turned over when worn.
  • the cutting knife 200 inserted into the holding device 100 can be seen from FIGS. 6 and 7. As soon as the Zap If 132 is snapped into the opening 202, the projections 216 and 218 are located between the projections 126 and 128 and the underside of the holding plate 104. The cutting knife 200 is thus held securely. The cutting knife 200 can be removed without the use of tools by pushing the pin 132 into the cavity 131 against the action of the compression spring 134 and moving the cutting knife a little lengthwise until the projections 216 and 218 between the projections 126 and 128 come to rest. The cutting knife is now free and can be removed.
  • the fastening process is carried out in the reverse order, with the cutting knife, when it is located with its protrusions 216 and 218 between the protrusions 126 and 128, is only slightly pressed against the underside of the holding plate 104, so that the pin extends over the outer surface 205, 206 is pressed into the cavity 131 and automatically engages in the opening 202 as soon as the opening 202 comes to coincide with the opening in the holding plate 104.
  • the corresponding projections 126, 128 and 216, 218 on the holding plate 104 and the cutting knife 200 are to be arranged with respect to the pin 132 in such a way that they interact when the cutting knife is installed.
  • the length of the projections or their mutual distances are to be selected so that when the cutting knife 200 is displaced longitudinally, the projections 216, 218 on the cutting knife can emerge through the gaps between adjacent projections 126, 128 on the holding plate 104.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Harvester Elements (AREA)
  • Knives (AREA)
EP85102691A 1984-03-13 1985-03-09 Dispositif de fixation pour couteau tournant sur une axe Expired EP0158813B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/589,143 US4586257A (en) 1984-03-13 1984-03-13 Releasable blade, blade holder and blade-holder combination
US589143 1984-03-13

Publications (2)

Publication Number Publication Date
EP0158813A1 true EP0158813A1 (fr) 1985-10-23
EP0158813B1 EP0158813B1 (fr) 1987-11-25

Family

ID=24356787

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85102691A Expired EP0158813B1 (fr) 1984-03-13 1985-03-09 Dispositif de fixation pour couteau tournant sur une axe

Country Status (6)

Country Link
US (1) US4586257A (fr)
EP (1) EP0158813B1 (fr)
JP (1) JPS611317A (fr)
KR (1) KR850007041A (fr)
CA (1) CA1230231A (fr)
DE (1) DE3561039D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10327384B2 (en) * 2013-03-14 2019-06-25 Husqvarna Ab Quick-coupling for mower blades

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4712364A (en) * 1986-06-30 1987-12-15 Deere & Company Quick attachable and detachable mower blade assembly
US5170561A (en) * 1989-04-14 1992-12-15 National Union Electric Corporation Hub attachment for a drive shaft of a cordless grass/weed groomer trimmer
US5303476A (en) * 1992-10-29 1994-04-19 Wci Outdoor Products, Inc. Line head for a rotary line trimmer
US6205755B1 (en) 1999-04-26 2001-03-27 Murray, Inc. Quick change blade assembly for a rotary mower
US7111403B2 (en) 1999-09-21 2006-09-26 Moore Mark R Head for line trimming apparatus
US6401344B1 (en) 1999-09-21 2002-06-11 Mark R. Moore Head for line trimming apparatus
GB2359475A (en) * 2001-03-07 2001-08-29 John Toy Vegetation cutting device
PT1570719E (pt) * 2004-03-05 2007-03-30 Outils Wolf Dispositivo de corte, tratando-se em especial de uma máquina de cortar a relva
US7536792B2 (en) * 2007-01-03 2009-05-26 Moore Mark R Head for a rotary line trimmer apparatus
US7775026B2 (en) * 2008-06-12 2010-08-17 Christopher Bever Lawn mower blade assembly for quick blade replacement and associated methods
US7784254B2 (en) * 2008-06-12 2010-08-31 Christopher Bever Lawn mower blade assembly having blade mount for quick blade replacement and associated methods
US8186135B2 (en) * 2009-06-26 2012-05-29 Leonardi Manufacturing Co. Inc. Electrically-powered combination lawn mower, trimmer and edger
US7958710B2 (en) 2009-06-26 2011-06-14 Briggs & Stratton Corporation Lawn mower blade coupling system
CN104067767B (zh) 2011-09-29 2018-05-11 胡斯华纳有限公司 草坪护理装置、刀片底座以及切割刀片
US20130269306A1 (en) 2012-04-11 2013-10-17 Briggs & Stratton Corporation Noise-reducing mower blade
US8931248B2 (en) 2012-06-12 2015-01-13 Mtd Products Inc Replaceable mower blade assembly
US8935909B2 (en) 2012-06-12 2015-01-20 Mtd Products Inc Replaceable mower blade and assembly
US8869369B1 (en) 2013-03-15 2014-10-28 Jacob J Roach Blade change carrier device
US9560800B2 (en) * 2014-04-11 2017-02-07 Deere & Company Quick change rotary mower blade assembly
EP3632198B1 (fr) 2014-09-05 2021-05-19 MTD Products Inc Lames de tondeuse à gazon à changement rapide
US9750183B2 (en) 2015-07-21 2017-09-05 Deere & Company Quick attach rotary mower blade system
US9924632B2 (en) 2016-05-20 2018-03-27 Deere & Company Quick connect mower blade system
US10517212B2 (en) 2017-10-03 2019-12-31 Deere & Company Quick attach rotary mower blade system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2870616A (en) * 1957-10-08 1959-01-27 Toro Mfg Corp Coupling for connecting rotary elements such as rotary mower blades with source of power
FR2178415A5 (fr) * 1972-03-30 1973-11-09 Technal International Sa
US3877146A (en) * 1973-11-28 1975-04-15 Allegretti & Co Rotating blade holder
US4213289A (en) * 1979-05-21 1980-07-22 Holger Kamppinen Fan device for rotary mowers
US4265018A (en) * 1978-08-21 1981-05-05 Black & Decker Inc. Grass trimmer device

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2215125A (en) * 1936-05-04 1940-09-17 Maltz Maxwell Surgical knife
US2237069A (en) * 1940-08-16 1941-04-01 Gustaf O Christenson Draw punch
US2477442A (en) * 1945-02-12 1949-07-26 Cramer Posture Chair Company Lawn mower
BE503358A (fr) * 1950-06-17
US3418793A (en) * 1966-07-06 1968-12-31 Fmc Corp Reinforcing means for rotary mower blades
US3507104A (en) * 1967-05-25 1970-04-21 Sperry Rand Corp Knife mounting
US4171608A (en) * 1976-10-04 1979-10-23 Hetrick Glenn C Safety attachment for lawn mowers
US4389776A (en) * 1980-09-12 1983-06-28 Okada Kogyo Kabushiki Kaisha Replaceable blade type knife

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2870616A (en) * 1957-10-08 1959-01-27 Toro Mfg Corp Coupling for connecting rotary elements such as rotary mower blades with source of power
FR2178415A5 (fr) * 1972-03-30 1973-11-09 Technal International Sa
US3877146A (en) * 1973-11-28 1975-04-15 Allegretti & Co Rotating blade holder
US4265018A (en) * 1978-08-21 1981-05-05 Black & Decker Inc. Grass trimmer device
US4213289A (en) * 1979-05-21 1980-07-22 Holger Kamppinen Fan device for rotary mowers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10327384B2 (en) * 2013-03-14 2019-06-25 Husqvarna Ab Quick-coupling for mower blades
US10849270B2 (en) 2013-03-14 2020-12-01 Husqvarna Ab Quick-coupling for mower blades

Also Published As

Publication number Publication date
CA1230231A (fr) 1987-12-15
DE3561039D1 (en) 1988-01-07
EP0158813B1 (fr) 1987-11-25
KR850007041A (ko) 1985-10-30
JPS611317A (ja) 1986-01-07
US4586257A (en) 1986-05-06

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